time = 1000ms;
count = 10;

.message-loading {
    height: rem(20);
    width: rem(20);
    position: absolute;
    top: 50%;
    left: 50%;

    .line {
        height: 50%;
        width: 50%;
        position: absolute;
        top: 50%;
        left: 50%;
        height: rem(2);
        margin-top: rem(-1);
        transform-origin: left center;
        animation: message-loading-fade time infinite linear;

        &:after {
            content: '';
            position: absolute;
            left: 50%;
            right: 0;
            height: 100%;
            border-radius: rem(2);
            background: #919399;
        }
    }

    for i in range(1, count) {
        .line:nth-child({i}) {
            transform: rotate((i - 1) * (360deg / count));
            animation-delay: (i - 1) * (time / count);
        }
    }
}

@keyframes message-loading-fade {
    0% {
        opacity: 0.1;
    }

    100% {
        opacity: 1;
    }
}